1 : <?php
2 : /*--------------------------------------------------------------------------+
3 : This file is part of eStudy.
4 : ressourcen/classes/filemanager/class.ressourcendb.inc.php
5 : - Modulgruppe: File Manager
6 : - Beschreibung: Klasse zur Datenbankanbindung
7 : - Version: 0.4, 08.01.08
8 : - Autor(en): Tobias Wild <tobias.wild@mni.fh-giessen.de>
9 : +---------------------------------------------------------------------------+
10 : This program is free software; you can redistribute it and/or
11 : modify it under the terms of the GNU General Public License
12 : as published by the Free Software Foundation; either version 2
13 : of the License, or any later version.
14 : +---------------------------------------------------------------------------+
15 : This program is distributed in the hope that it will be useful,
16 : but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 : GNU General Public License for more details.
19 : You should have received a copy of the GNU General Public License
20 : along with this program; if not, write to the Free Software
21 : Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 : +--------------------------------------------------------------------------*/
23 :
24 1 : if ( !defined("PATH_TO_ROOT") ) {
25 0 : define( "PATH_TO_ROOT", "../../" );
26 0 : }
27 :
28 1 : class RessourcenDB {
29 : private $fileManager = null;
30 :
31 : public function __construct( $fileManager = null ) {
32 0 : $this->fileManager = $fileManager;
33 0 : }
34 :
35 : public function setFileManager( $filemanager ) {
36 0 : $this->fileManager = $filemanager;
37 0 : }
38 :
39 : public static function getVisibilityConstraintSQL() {
40 0 : global $db, $settings;
41 0 : $time = Data::toMysql( time() );
42 0 : $userid = Data::toMysql( $_SESSION["userid"] );
43 0 : $sql_add = "";
44 0 : if ($_SESSION['usergroup'] == STUDENT || $_SESSION['usergroup'] == ALUMNUS || $_SESSION['usergroup'] == SCHUELER || $_SESSION['usergroup'] == GAST || $_SESSION["usergroup"] == SEKRETARIAT) { // Hier darf kein visible_type eingeschraenkt werden, da sonst die Einzeluser-Berechtigung nicht mehr funktioniert !!!
45 0 : $sql_add = "AND ((filelist.userID='".$userid."' OR (start_time<'$time' AND end_time>'$time' AND visible_type=1))";
46 0 : if (isset($_SESSION["assistent"])) // TUTOR
47 0 : $sql_add = "AND ((visible_type<='2' OR filelist.userID='".$userid."')";
48 0 : $visibleFiles = $db->get_col("SELECT fileID FROM filevisible WHERE userID='".$userid."'");
49 0 : if ($db->num_rows) $sql_add.= " OR fileID IN (".implode(",", $visibleFiles) .")";
50 0 : $sql_add.= ")";
51 0 : }
52 0 : return $sql_add;
53 : }
54 :
55 : public function getSubFolder( $p_folder ) {
56 0 : global $db;
57 0 : $sql_add = self::getVisibilityConstraintSQL();
58 0 : $folderID = Data::toMysql( $p_folder->getID() );
59 0 : $folders_db = (array) $db->get_results("SELECT courseID, create_time, description, student_write, userID, fileID, link, visible_type, name FROM filelist WHERE parent_object='".$folderID."' AND courseID='".Data::toMysql( $_SESSION['course'] )."' AND type='folder' $sql_add ORDER BY link");
60 0 : $folders = array();
61 0 : foreach ( $folders_db as $folder_db ) {
62 0 : $folder = $this->getFolderObject( $folder_db );
63 0 : $folder->setParentFolder( $p_folder );
64 0 : $folder->setFolderState( $db->get_var("SELECT userID FROM filetreelayout WHERE userID='".Data::toMysql( $_SESSION['userid'] )."' AND folderID='".Data::toMysql( $folder_db->fileID )."'") );
65 0 : $folders[] = $folder;
66 0 : }
67 0 : return $folders;
68 : }
69 :
70 : public static function saveFolderState( $folder ) {
71 0 : global $db;
72 0 : $folderState = $folder->getFolderState();
73 0 : $userid = Data::toMysql( $_SESSION['userid'] );
74 0 : $folderID = Data::toMysql( $folder->getID() );
75 0 : if ($folderState) {
76 0 : $db->query("DELETE FROM filetreelayout WHERE userID='".$userid."' AND folderID='".$folderID."'");
77 0 : $folder->setFolderState(false);
78 0 : } else {
79 0 : $db->query("INSERT INTO filetreelayout (userID, folderID) VALUES ('".$userid."','".$folderID."')");
80 0 : $folder->setFolderState(true);
81 : }
82 0 : }
83 :
84 : private function getFileObject( $db_object ) {
85 0 : $file = new File();
86 0 : $file->setFileID ( $db_object->fileID );
87 0 : $file->setVisibleType ( $db_object->visible_type );
88 0 : $file->setUserID ( $db_object->userID );
89 0 : $file->setName ( $db_object->name );
90 0 : $file->setOrigFileName ( $db_object->orig_filename );
91 0 : $file->setType ( $db_object->type );
92 0 : $file->setLink ( $db_object->link );
93 0 : $file->setSize ( $db_object->size );
94 0 : $file->setCounter ( $db_object->counter );
95 0 : $file->setCreateTime ( $db_object->create_time );
96 0 : $file->setDescription ( $db_object->description );
97 0 : $file->setExtension ( $db_object->extension );
98 0 : $file->setCourseID ( $db_object->courseID );
99 0 : $file->setFileManager( $this->fileManager );
100 0 : return $file;
101 : }
102 :
103 : private function getFolderObject( $folder_db ) {
104 0 : $folder = new Folder( $folder_db->fileID );
105 0 : $folder->setCourseID( $folder_db->courseID );
106 0 : $folder->setUserID( $folder_db->userID );
107 0 : $folder->setLink( $folder_db->link );
108 0 : $folder->setVisibleType( $folder_db->visible_type );
109 0 : $folder->setName( $folder_db->name );
110 0 : $folder->setStudentWrite( $folder_db->student_write );
111 0 : $folder->setCreateTime( $folder_db->create_time );
112 0 : $folder->setDescription( $folder_db->description );
113 0 : $folder->setFileManager( $this->fileManager );
114 0 : return $folder;
115 : }
116 :
117 : public function getFiles( $folderID, $sortString = "create_time" , $desc = false ) {
118 0 : global $db;
119 0 : $course = Data::toMysql( $_SESSION["course"] );
120 0 : $direction = ( $desc ) ? "DESC" : "ASC";
121 0 : $sortString = Data::toMysql( $sortString );
122 0 : $folderID = Data::toMysql( $folderID );
123 :
124 0 : $sql_add = self::getVisibilityConstraintSQL();
125 0 : if ( $sortString == "userID" ) {
126 0 : $files_db = (array) $db->get_results("SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter, create_time, description, extension, courseID FROM filelist LEFT OUTER JOIN user ON (filelist.userID=user.ID) WHERE parent_object='".$folderID."' AND (courseID=$course OR courseID=0) AND type!='folder' $sql_add ". " ORDER BY user.Nachname " . $direction);
127 0 : } else {
128 0 : $files_db = (array) $db->get_results("SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter, create_time, description, extension, courseID FROM filelist WHERE parent_object='".$folderID."' AND (courseID='$course' OR courseID=0) AND type!='folder' ".$sql_add." ORDER BY ".$sortString. " ". $direction);
129 : }
130 0 : $files = array();
131 0 : foreach ( $files_db as $file_db ) {
132 0 : $files[] = self::getFileObject( $file_db );
133 0 : }
134 0 : return $files;
135 : }
136 :
137 : public function getNewestFiles( $limit = 20 ) {
138 0 : global $db;
139 0 : $time = time();
140 0 : $course = Data::toMysql( $_SESSION["course"] );
141 0 : $limit = Data::toMysql( $limit );
142 0 : $files_db = (array) $db->get_results("SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter, create_time, description, extension, courseID FROM filelist WHERE courseID='$course' AND visible_type=1 AND type!='folder' AND start_time<'$time' AND end_time>'$time' ORDER BY create_time DESC LIMIT $limit");
143 0 : $files = array();
144 0 : foreach ( $files_db as $file_db ) {
145 0 : $files[] = self::getFileObject( $file_db );
146 0 : }
147 0 : return $files;
148 : }
149 :
150 : public function getMostRatedFiles( $limit = 20 ) {
151 0 : global $db;
152 0 : $time = time();
153 0 : $course = Data::toMysql( $_SESSION["course"] );
154 0 : $limit = Data::toMysql( $limit );
155 0 : $files_db = (array) $db->get_results("SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter, create_time, description, extension, courseID FROM filelist WHERE courseID='$course' AND visible_type=1 AND type!='folder' AND start_time<'$time' AND end_time>'$time' ORDER BY counter DESC LIMIT $limit");
156 0 : $files = array();
157 0 : foreach ( $files_db as $file_db ) {
158 0 : $files[] = self::getFileObject( $file_db );
159 0 : }
160 0 : return $files;
161 : }
162 :
163 : public function getFileByID( $fileID ) {
164 0 : global $db;
165 0 : $fileID = Data::toMysql( $fileID );
166 0 : $file_db = $db->get_row("SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter, create_time, description, extension, courseID FROM filelist WHERE fileID = '$fileID' AND type='file'");
167 0 : if ( $file_db ) {
168 0 : return $this->getFileObject( $file_db );
169 : }
170 0 : return false;
171 : }
172 :
173 :
174 : public function getFolderByID( $folderID ) {
175 0 : global $db;
176 0 : $folderID = Data::toMysql( $folderID );
177 0 : $folder_db = $db->get_row("SELECT name, fileID, courseID, link, userID, student_write, create_time, description, visible_type FROM filelist WHERE type='folder' AND fileID='".$folderID."'");
178 0 : if ( $folder_db ) {
179 0 : return $this->getFolderObject( $folder_db );
180 : }
181 0 : return false;
182 : }
183 :
184 : public function getUserCourses( $userID ) {
185 0 : global $settings, $db;
186 0 : $userID = Data::toMysql( $userID );
187 0 : $courseID = Data::toMysql( $_SESSION['course'] );
188 0 : if ($_SESSION['usergroup'] == ADMIN || $_SESSION['usergroup'] == SEKRETARIAT) $sql = "SELECT c.ID, c.ShortName AS SN, u.ShortName
189 : FROM courses AS c
190 : RIGHT JOIN user_course AS uc
191 : ON c.ID = uc.courseID
192 : LEFT JOIN user AS u
193 : ON uc.userID = u.ID
194 : WHERE ((u.Usergroup = 3 AND uc.differentUsergroup = 0)
195 : OR uc.differentUsergroup = 3)
196 : AND c.closed = 0 " .
197 0 : "AND c.ID <> ". $courseID ."
198 0 : ORDER BY c.ShortName, c.ID";
199 : else $sql = "SELECT c.ID, c.ShortName AS SN, u.ShortName
200 : FROM (user_course AS uc1, user AS u)
201 : RIGHT JOIN user_course AS uc2
202 : ON uc1.courseID = uc2.courseID
203 : RIGHT JOIN courses AS c
204 : ON uc1.courseID = c.ID
205 : WHERE ((u.Usergroup = 3 AND uc2.differentUsergroup = 0)
206 : OR uc2.differentUsergroup = 3)
207 0 : AND uc1.userID = ".$userID."
208 : AND u.ID = uc2.userID
209 0 : AND c.closed = 0 " .
210 0 : "AND c.ID <> ". $courseID ."
211 0 : ORDER BY c.ShortName, c.ID";
212 0 : $courses = (array) $db->get_results($sql);
213 :
214 0 : return $courses;
215 : }
216 :
217 : function countSubElements($folderID, $subFolders = true) {
218 0 : global $db;
219 0 : $count = 0;
220 0 : $folderID = Data::toMysql( $folderID );
221 0 : $sql_add = self::getVisibilityConstraintSQL();
222 0 : if ($subFolders) {
223 0 : $folders = $db->get_col("SELECT fileID FROM filelist WHERE type='folder' AND parent_object='".$folderID."' ".$sql_add);
224 0 : if ($folders) foreach($folders as $folder) {
225 0 : $count+= $this->countSubElements($folder);
226 0 : }
227 0 : }
228 0 : $count+= $db->get_var("SELECT COUNT(*) FROM filelist WHERE type!='folder' AND parent_object='$folderID' $sql_add");
229 0 : return $count;
230 : }
231 :
232 :
233 : /**
234 : * Get short course name.
235 : *
236 : * @param Integer $courseID Course id
237 : * @return String Short course name
238 : */
239 : function getCourseShortNameByID($courseID) {
240 0 : global $db;
241 :
242 0 : $courseID = Data::toMysql($courseID);
243 :
244 0 : return $db->get_var("SELECT `ShortName` FROM `courses` WHERE `ID` = $courseID");
245 : }
246 :
247 : /**
248 : * Log file download.
249 : *
250 : * Write log entry to filelog table and increment download count in filelist table.
251 : *
252 : * @param Integer $resourceID Resource id
253 : */
254 : public function logResourceDownload($resourceID) {
255 0 : global $db;
256 :
257 0 : $time = Data::toMysql(time());
258 0 : $resourceID = Data::toMysql($resourceID);
259 0 : $db->query("INSERT INTO filelog (userID, fileID, date) VALUES ('".$_SESSION['userid']."','$resourceID','$time')");
260 0 : $db->query("UPDATE filelist SET counter=counter+1 WHERE fileID='$resourceID'");
261 0 : }
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